/*!
 * jQuery twitter bootstrap wizard plugin
 * Examples and documentation at: http://github.com/VinceG/twitter-bootstrap-wizard
 * version 1.0
 * Requires jQuery v1.3.2 or later
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * Authors: Vadim Vincent Gabriel (http://vadimg.com), Jason Gill (www.gilluminate.com)
 */
;(function($) {
    var bootstrapWizardCreate = function(element, options) {
        var element = $(element);
        var obj = this;

        // Merge options with defaults
        var $settings = $.extend({}, $.fn.bootstrapWizard.defaults, options);
        var $activeTab = null;
        var $navigation = null;

        this.fixNavigationButtons = function() {
            // Get the current active tab
            if(!$activeTab.length) {
                // Select first one
                $navigation.find('a:first').tab('show');
                $activeTab = $navigation.find('li:first');
            }

            // See if we're currently in the first/last then disable the previous and last buttons
            $($settings.previousSelector, element).toggleClass('disabled', (obj.firstIndex() >= obj.currentIndex()));
            $($settings.nextSelector, element).toggleClass('disabled', (obj.currentIndex() >= obj.navigationLength()));

            // We are unbinding and rebinding to ensure single firing and no double-click errors
            $($settings.nextSelector, element).unbind('click', obj.next);
            $($settings.previousSelector, element).unbind('click', obj.previous);
            $($settings.lastSelector, element).unbind('click', obj.last);
            $($settings.firstSelector, element).unbind('click', obj.first);
            // Next/Previous events
            $($settings.nextSelector, element).one('click', obj.next);
            $($settings.previousSelector, element).one('click', obj.previous);
            $($settings.lastSelector, element).one('click', obj.last);
            $($settings.firstSelector, element).one('click', obj.first);

            if($settings.onTabShow && typeof $settings.onTabShow === 'function' && $settings.onTabShow($activeTab, $navigation, obj.currentIndex())===false){
                return false;
            }
        };

        this.next = function(e) {

            // If we clicked the last then dont activate this
            if(element.hasClass('last')) {
                return false;
            }

            if($settings.onNext && typeof $settings.onNext === 'function' && $settings.onNext($activeTab, $navigation, obj.nextIndex())===false){
                return false;
            }

            // Did we click the last button
            $index = obj.nextIndex();
            if($index > obj.navigationLength()) {
            } else {
                $navigation.find('li:eq('+$index+') a').tab('show');
            }
        };

        this.previous = function(e) {

            // If we clicked the first then dont activate this
            if(element.hasClass('first')) {
                return false;
            }

            if($settings.onPrevious && typeof $settings.onPrevious === 'function' && $settings.onPrevious($activeTab, $navigation, obj.previousIndex())===false){
                return false;
            }

            $index = obj.previousIndex();
            if($index < 0) {
            } else {
                $navigation.find('li:eq('+$index+') a').tab('show');
            }
        };

        this.first = function(e) {
            if($settings.onFirst && typeof $settings.onFirst === 'function' && $settings.onFirst($activeTab, $navigation, obj.firstIndex())===false){
                return false;
            }

            // If the element is disabled then we won't do anything
            if(element.hasClass('disabled')) {
                return false;
            }
            $navigation.find('li:eq(0) a').tab('show');

        };
        this.last = function(e) {
            if($settings.onLast && typeof $settings.onLast === 'function' && $settings.onLast($activeTab, $navigation, obj.lastIndex())===false){
                return false;
            }

            // If the element is disabled then we won't do anything
            if(element.hasClass('disabled')) {
                return false;
            }
            $navigation.find('li:eq('+obj.navigationLength()+') a').tab('show');
        };
        this.currentIndex = function() {
            return $navigation.find('li').index($activeTab);
        };
        this.firstIndex = function() {
            return 0;
        };
        this.lastIndex = function() {
            return obj.navigationLength();
        };
        this.getIndex = function(e) {
            return $navigation.find('li').index(e);
        };
        this.nextIndex = function() {
            return $navigation.find('li').index($activeTab) + 1;
        };
        this.previousIndex = function() {
            return $navigation.find('li').index($activeTab) - 1;
        };
        this.navigationLength = function() {
            return $navigation.find('li').length - 1;
        };
        this.activeTab = function() {
            return $activeTab;
        };
        this.nextTab = function() {
            return $navigation.find('li:eq('+(obj.currentIndex()+1)+')').length ? $navigation.find('li:eq('+(obj.currentIndex()+1)+')') : null;
        };
        this.previousTab = function() {
            if(obj.currentIndex() <= 0) {
                return null;
            }
            return $navigation.find('li:eq('+parseInt(obj.currentIndex()-1)+')');
        };
        this.show = function(index) {
            return element.find('li:eq(' + index + ') a').tab('show');
        };
        this.disable = function(index) {
            $navigation.find('li:eq('+index+')').addClass('disabled');
        };
        this.enable = function(index) {
            $navigation.find('li:eq('+index+')').removeClass('disabled');
        };
        this.hide = function(index) {
            $navigation.find('li:eq('+index+')').hide();
        };
        this.display = function(index) {
            $navigation.find('li:eq('+index+')').show();
        };
        this.remove = function(args) {
            var $index = args[0];
            var $removeTabPane = typeof args[1] != 'undefined' ? args[1] : false;
            var $item = $navigation.find('li:eq('+$index+')');

            // Remove the tab pane first if needed
            if($removeTabPane) {
                var $href = $item.find('a').attr('href');
                $($href).remove();
            }

            // Remove menu item
            $item.remove();
        };

        $navigation = element.find('ul:first', element);
        $activeTab = $navigation.find('li.active', element);

        if(!$navigation.hasClass($settings.tabClass)) {
            $navigation.addClass($settings.tabClass);
        }

        // Load onInit
        if($settings.onInit && typeof $settings.onInit === 'function'){
            $settings.onInit($activeTab, $navigation, 0);
        }

        // Load onShow
        if($settings.onShow && typeof $settings.onShow === 'function'){
            $settings.onShow($activeTab, $navigation, obj.nextIndex());
        }

        // Work the next/previous buttons
        obj.fixNavigationButtons();

        $('a[data-toggle="tab"]', $navigation).on('click', function (e) {
            // Get the index of the clicked tab
            var clickedIndex = $navigation.find('li').index($(e.currentTarget).parent('li'));
            if($settings.onTabClick && typeof $settings.onTabClick === 'function' && $settings.onTabClick($activeTab, $navigation, obj.currentIndex(), clickedIndex)===false){
                return false;
            }
        });

        $('a[data-toggle="tab"]', $navigation).on('shown', function (e) {  // use shown instead of show to help prevent double firing
            $element = $(e.target).parent();
            var nextTab = $navigation.find('li').index($element);

            // If it's disabled then do not change
            if($element.hasClass('disabled')) {
                return false;
            }

            if($settings.onTabChange && typeof $settings.onTabChange === 'function' && $settings.onTabChange($activeTab, $navigation, obj.currentIndex(), nextTab)===false){
                return false;
            }

            $activeTab = $element; // activated tab
            obj.fixNavigationButtons();
        });
    };
    $.fn.bootstrapWizard = function(options) {
        //expose methods
        if (typeof options == 'string') {
            var args = Array.prototype.slice.call(arguments, 1)
            if(args.length === 1) {
                args.toString();
            }
            return this.data('bootstrapWizard')[options](args);
        }
        return this.each(function(index){
            var element = $(this);
            // Return early if this element already has a plugin instance
            if (element.data('bootstrapWizard')) return;
            // pass options to plugin constructor
            var wizard = new bootstrapWizardCreate(element, options);
            // Store plugin object in this element's data
            element.data('bootstrapWizard', wizard);
        });
    };

// expose options
    $.fn.bootstrapWizard.defaults = {
        tabClass:         'nav nav-pills',
        nextSelector:     '.wizard li.next',
        previousSelector: '.wizard li.previous',
        firstSelector:    '.wizard li.first',
        lastSelector:     '.wizard li.last',
        onShow:           null,
        onInit:           null,
        onNext:           null,
        onPrevious:       null,
        onLast:           null,
        onFirst:          null,
        onTabChange:      null,
        onTabClick:       null,
        onTabShow:        null
    };

})(jQuery);